1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
|
/* NSC -- new Scala compiler
* Copyright 2005-2009 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc
import java.io.{File, FileOutputStream, PrintWriter}
import java.io.{IOException, FileNotFoundException}
import java.nio.charset._
import compat.Platform.currentTime
import scala.tools.nsc.io.{SourceReader, AbstractFile}
import scala.tools.nsc.reporters._
import scala.tools.nsc.util.{ClassPath, SourceFile, BatchSourceFile, OffsetPosition}
import scala.collection.mutable.{HashSet, HashMap, ListBuffer}
import symtab._
import symtab.classfile.{PickleBuffer, Pickler}
import dependencies.{DependencyAnalysis}
import util.Statistics
import plugins.Plugins
import ast._
import ast.parser._
import typechecker._
import transform._
import backend.icode.{ICodes, GenICode, Checkers}
import backend.ScalaPrimitives
import backend.jvm.GenJVM
import backend.msil.GenMSIL
import backend.opt.{Inliners, ClosureElimination, DeadCodeElimination}
import backend.icode.analysis._
class Global(var settings: Settings, var reporter: Reporter) extends SymbolTable
with CompilationUnits
with Plugins
with PhaseAssembly
{
// alternate constructors ------------------------------------------
def this(reporter: Reporter) =
this(new Settings(err => reporter.error(null,err)),
reporter)
def this(settings: Settings) =
this(settings, new ConsoleReporter(settings))
//def this() = this(new Settings, new ConsoleReporter)
// sub-components --------------------------------------------------
/** Print tree in detailed form */
object nodePrinters extends {
val global: Global.this.type = Global.this
} with NodePrinters {
infolevel = InfoLevel.Verbose
}
val nodeToString = nodePrinters.nodeToString
/** Generate ASTs */
object gen extends {
val global: Global.this.type = Global.this
} with TreeGen {
def mkAttributedCast(tree: Tree, pt: Type): Tree =
typer.typed(mkAttributedCastUntyped(tree, pt))
}
/** Fold constants */
object constfold extends {
val global: Global.this.type = Global.this
} with ConstantFolder
/** Tree checker (used for testing and debugging) */
object checker extends {
val global: Global.this.type = Global.this
} with TreeCheckers
/** ICode generator */
object icodes extends {
val global: Global.this.type = Global.this
} with ICodes
/** ICode analysis for optimization */
object analysis extends {
val global: Global.this.type = Global.this
} with TypeFlowAnalysis
/** Copy propagation for optimization */
object copyPropagation extends {
val global: Global.this.type = Global.this
} with CopyPropagation
/** Icode verification */
object checkers extends {
val global: Global.this.type = Global.this
} with Checkers
/** Some statistics (normally disabled) */
object statistics extends {
val global: Global.this.type = Global.this
} with Statistics
/** Computing pairs of overriding/overridden symbols */
object overridingPairs extends {
val global: Global.this.type = Global.this
} with OverridingPairs
/** Representing ASTs as graphs */
object treeBrowsers extends {
val global: Global.this.type = Global.this
} with TreeBrowsers
val treeBrowser = treeBrowsers.create()
// val copy = new LazyTreeCopier()
/** A map of all doc comments, indexed by symbols.
* Only active in onlyPresentation mode
*/
val comments =
if (onlyPresentation) new HashMap[Symbol,String]
else null
/** A map of argument names for methods
* !!! can be dropped once named method arguments are in !!!
*/
val methodArgumentNames =
if (onlyPresentation) new HashMap[Symbol,List[List[Symbol]]]
else null
// ------------ Hooks for interactive mode-------------------------
/** Return a position correponding to tree startaing at `start`, with tip
* at `mid`, and ending at `end`. ^ batch mode errors point at tip.
*/
def rangePos(source: SourceFile, start: Int, mid: Int, end: Int) = OffsetPosition(source, mid)
/** Called every time an AST node is succesfully typedchecked in typerPhase.
*/
def signalDone(context: analyzer.Context, old: Tree, result: Tree) {}
/** Register new context; called for every created context
*/
def registerContext(c: analyzer.Context) {}
// ------------------ Reporting -------------------------------------
import nsc.util.NoPosition
def error(msg: String) = reporter.error(NoPosition, msg)
def warning(msg: String) = reporter.warning(NoPosition, msg)
def inform(msg: String) = Console.err.println(msg)
def inform[T](msg: String, value: T): T = { inform(msg+value); value }
//reporter.info(null, msg, true)
def informProgress(msg: String) =
if (settings.verbose.value) inform("[" + msg + "]")
def informTime(msg: String, start: Long) =
informProgress(msg + " in " + (currentTime - start) + "ms")
def log(msg: AnyRef) {
if (settings.log contains phase.name) inform("[log " + phase + "] " + msg)
}
class ErrorWithPosition(val pos: Int, val error: Throwable) extends Error
def tryWith[T](pos: Int, body: => T): T = try {
body
} catch {
case e : ErrorWithPosition => throw e
case te: TypeError => throw te
case e : Error => throw new ErrorWithPosition(pos, e)
case e : RuntimeException => throw new ErrorWithPosition(pos, e)
}
def catchWith[T](source : SourceFile, body : => T) : T = try {
body
} catch {
case e : ErrorWithPosition =>
logError("POS: " + source.dbg(e.pos), e)
throw e.error
}
def logError(msg: String, t: Throwable): Unit = ()
def abort(msg: String) = throw new Error(msg)
// ------------ File interface -----------------------------------------
private val reader: SourceReader = {
def stdCharset: Charset = {
settings.encoding.value = Properties.encodingString // A mandatory charset
Charset.forName(settings.encoding.value)
}
val charset =
try {
Charset.forName(settings.encoding.value)
} catch {
case _: IllegalCharsetNameException =>
error("illegal charset name '" + settings.encoding.value + "'")
stdCharset
case _: UnsupportedCharsetException =>
error("unsupported charset '" + settings.encoding.value + "'")
stdCharset
}
try {
val clazz = Class.forName(settings.sourceReader.value)
val ccon = clazz.getConstructor(classOf[java.nio.charset.CharsetDecoder], classOf[Reporter])
ccon.newInstance(charset.newDecoder(), reporter).asInstanceOf[SourceReader]
//new SourceReader(charset.newDecoder())
} catch {
case e =>
error("exception while trying to instantiate source reader \""+settings.sourceReader.value+"\" ");
new SourceReader(charset.newDecoder(), reporter)
}
}
settings.dependenciesFile.value match {
case "none" => ()
case x =>
val jfile = new java.io.File(x)
if (!jfile.exists) jfile.createNewFile
dependencyAnalysis.loadFrom(AbstractFile.getFile(jfile))
}
lazy val classPath0 = new ClassPath(false && onlyPresentation)
lazy val classPath =
if (forMSIL)
new classPath0.Build(settings.sourcepath.value, settings.outdir.value)
else
new classPath0.Build(settings.classpath.value, settings.sourcepath.value,
settings.outdir.value, settings.bootclasspath.value,
settings.extdirs.value, settings.Xcodebase.value)
/* .NET's equivalent of a classpath */
lazy val assemrefs = {
import java.util.{StringTokenizer}
val set = new HashSet[File]
val assems = new StringTokenizer(settings.assemrefs.value, File.pathSeparator)
while (assems.hasMoreTokens())
set += new java.io.File(assems.nextToken())
set
}
if (settings.verbose.value) {
inform("[Classpath = " + classPath + "]")
if (forMSIL) inform("[AssemRefs = " + settings.assemrefs.value + "]")
}
def getSourceFile(f: AbstractFile): SourceFile =
new BatchSourceFile(f, reader.read(f))
def getSourceFile(name: String): SourceFile = {
val f = AbstractFile.getFile(name)
if (f eq null) throw new FileNotFoundException(
"source file '" + name + "' could not be found")
getSourceFile(f)
}
def getSourceFile(clazz: Symbol): SourceFile = {
val ret = classPath.root.find(clazz.fullNameString(File.separatorChar), false)
if (!ret.isSourceFile) throw new FileNotFoundException(
"source file for " + clazz + " could not be found")
getSourceFile(ret.sourceFile)
}
lazy val loaders : SymbolLoaders { val global : Global.this.type } = new {
val global: Global.this.type = Global.this
} with SymbolLoaders
def rootLoader: LazyType =
if (forMSIL) new loaders.NamespaceLoader(classPath.root)
else new loaders.PackageLoader(classPath.root /* getRoot() */)
// ------------ Phases -------------------------------------------}
var globalPhase: Phase = NoPhase
val MaxPhases = 64
val phaseWithId = new Array[Phase](MaxPhases)
for (i <- List.range(0, MaxPhases)) phaseWithId(i) = NoPhase
abstract class GlobalPhase(prev: Phase) extends Phase(prev) {
phaseWithId(id) = this
def run { currentRun.units foreach applyPhase }
def apply(unit: CompilationUnit): Unit
private val isErased = prev.name == "erasure" || prev.erasedTypes
override def erasedTypes: Boolean = isErased
private val isFlat = prev.name == "flatten" || prev.flatClasses
override def flatClasses: Boolean = isFlat
private val isDevirtualized = prev.name == "devirtualize" || prev.devirtualized
override def devirtualized: Boolean = isDevirtualized // (part of DEVIRTUALIZE)
/** Is current phase cancelled on this unit? */
def cancelled(unit: CompilationUnit) =
reporter.cancelled ||
unit.isJava && this.id > currentRun.namerPhase.id
final def applyPhase(unit: CompilationUnit) {
if (settings.debug.value) inform("[running phase " + name + " on " + unit + "]")
val unit0 = currentRun.currentUnit
try {
currentRun.currentUnit = unit
reporter.setSource(unit.source)
if (!cancelled(unit)) apply(unit)
currentRun.advanceUnit
} finally {
assert(currentRun.currentUnit == unit)
currentRun.currentUnit = unit0
}
}
}
// phaseName = "parser"
object syntaxAnalyzer extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]()
val runsRightAfter = None
} with SyntaxAnalyzer
// factory method for
// phaseName = "namer"
// phaseName = "parser"
object analyzer extends {
val global: Global.this.type = Global.this
} with Analyzer
/** Switch to turn on detailed type logs */
var printTypings = false
// phaseName = "superaccessors"
object superAccessors extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("typer")
val runsRightAfter = None
} with SuperAccessors
// phaseName = "pickler"
object pickler extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("superaccessors")
val runsRightAfter = None
} with Pickler
// phaseName = "refchecks"
object refchecks extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("pickler")
val runsRightAfter = None
} with RefChecks
// object devirtualize extends {
// val global: Global.this.type = Global.this
// } with DeVirtualize
// phaseName = "liftcode"
object liftcode extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("refchecks")
val runsRightAfter = None
} with LiftCode
// phaseName = "uncurry"
object uncurry extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("refchecks","liftcode")
val runsRightAfter = None
} with UnCurry
// phaseName = "tailcalls"
object tailCalls extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("uncurry")
val runsRightAfter = None
} with TailCalls
// object checkDefined extends {
// val global: Global.this.type = Global.this
// } with CheckDefined
// phaseName = "explicitouter"
object explicitOuter extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("tailcalls")
val runsRightAfter = None
} with ExplicitOuter
// phaseName = "specialize"
object specializeTypes extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("")
val runsRightAfter = Some("tailcalls")
} with SpecializeTypes
// phaseName = "erasure"
object erasure extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("explicitouter")
val runsRightAfter = Some("explicitouter")
} with Erasure
// phaseName = "lazyvals"
object lazyVals extends {
val global: Global.this.type = Global.this
final val FLAGS_PER_WORD = 32
val runsAfter = List[String]("erasure")
val runsRightAfter = None
} with LazyVals
// phaseName = "lambdalift"
object lambdaLift extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("lazyvals")
val runsRightAfter = None
} with LambdaLift
// phaseName = "detach"
// object detach extends {
// val global: Global.this.type = Global.this
// val runsAfter = List("lambdalift")
// val runsRightAfter = Some("lambdalift")
// } with Detach
// phaseName = "constructors"
object constructors extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("lambdalift")
val runsRightAfter = None
} with Constructors
// phaseName = "flatten"
object flatten extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("constructors")
val runsRightAfter = None
} with Flatten
// phaseName = "mixin"
object mixer extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("flatten","constructors")
val runsRightAfter = None
} with Mixin
// phaseName = "cleanup"
object cleanup extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("mixin")
val runsRightAfter = None
} with CleanUp
// phaseName = "icode"
object genicode extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("cleanup")
val runsRightAfter = None
} with GenICode
// object icodePrinter extends backend.icode.Printers {
// val global: Global.this.type = Global.this
// }
// phaseName = "???"
object scalaPrimitives extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]()
val runsRightAfter = None
} with ScalaPrimitives
// phaseName = "inliner"
object inliner extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("icode")
val runsRightAfter = None
} with Inliners
// phaseName = "closelim"
object closureElimination extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("inliner")
val runsRightAfter = None
} with ClosureElimination
// phaseName = "dce"
object deadCode extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("closelim")
val runsRightAfter = None
} with DeadCodeElimination
// phaseName = "jvm"
object genJVM extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("dce")
val runsRightAfter = None
} with GenJVM
object dependencyAnalysis extends {
val global: Global.this.type = Global.this
val runsAfter = List("jvm")
val runsRightAfter = None
} with DependencyAnalysis
// phaseName = "msil"
object genMSIL extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]("dce")
val runsRightAfter = None
} with GenMSIL
// phaseName = "terminal"
object terminal extends {
val global: Global.this.type = Global.this
val phaseName = "terminal"
val runsAfter = List[String]("jvm","msil")
val runsRightAfter = None
} with SubComponent {
private var cache: Option[GlobalPhase] = None
def newPhase(prev: Phase): GlobalPhase = {
if (cache.isEmpty) cache = Some(new TerminalPhase(prev))
cache.get
}
def reset() {
cache = None
}
class TerminalPhase(prev: Phase) extends GlobalPhase(prev) {
def name = "terminal"
def apply(unit: CompilationUnit) {}
}
}
// phaseName = "SAMPLE PHASE"
object sampleTransform extends {
val global: Global.this.type = Global.this
val runsAfter = List[String]()
val runsRightAfter = None
} with SampleTransform
object icodeChecker extends checkers.ICodeChecker()
object typer extends analyzer.Typer(
analyzer.NoContext.make(EmptyTree, Global.this.definitions.RootClass, newScope))
/* Add the internal compiler phases to the phases set
*/
protected def computeInternalPhases() {
phasesSet += syntaxAnalyzer // The parser
phasesSet += analyzer.namerFactory // note: types are there because otherwise
phasesSet += analyzer.typerFactory // consistency check after refchecks would fail.
phasesSet += superAccessors // add super accessors
phasesSet += pickler // serialize symbol tables
phasesSet += refchecks // perform reference and override checking, translate nested objects
// if (false && settings.Xexperimental.value)
// phasesSet += devirtualize // Desugar virtual classes4
phasesSet += uncurry // uncurry, translate function values to anonymous classes
phasesSet += tailCalls // replace tail calls by jumps
if (settings.specialize.value)
phasesSet += specializeTypes
phasesSet += explicitOuter // replace C.this by explicit outer pointers, eliminate pattern matching
phasesSet += erasure // erase generic types to Java 1.4 types, add interfaces for traits
phasesSet += lazyVals //
phasesSet += lambdaLift // move nested functions to top level
// if (forJVM && settings.Xdetach.value)
// phasesSet += detach // convert detached closures
phasesSet += constructors // move field definitions into constructors
phasesSet += mixer // do mixin composition
phasesSet += cleanup // some platform-specific cleanups
phasesSet += genicode // generate portable intermediate code
phasesSet += inliner // optimization: do inlining
phasesSet += closureElimination // optimization: get rid of uncalled closures
phasesSet += deadCode // optimization: get rid of dead cpde
phasesSet += terminal // The last phase in the compiler chain
if (! forMSIL) {
phasesSet += flatten // get rid of inner classes
}
if (forJVM) {
phasesSet += liftcode // generate reified trees
phasesSet += genJVM // generate .class files
phasesSet += dependencyAnalysis
}
if (forMSIL) {
phasesSet += genMSIL // generate .msil files
}
}
/* Helper method for sequncing the phase assembly
*/
private def computePhaseDescriptors: List[SubComponent] = {
computeInternalPhases() // Global.scala
computePluginPhases() // plugins/Plugins.scala
buildCompilerFromPhasesSet() // PhaseAssembly.scala
}
/* Simple option value to hold the compiler phase chain */
private var phasesCache: Option[List[SubComponent]] = None
/* The set of phase objects that is the basis for the compiler phase chain */
protected val phasesSet : HashSet[SubComponent] = new HashSet[SubComponent]
/** A accessor for the phase descriptor list (List of SubComponents), Only calculate the list once */
def phaseDescriptors = {
if (phasesCache.isEmpty) phasesCache = Some(computePhaseDescriptors)
phasesCache.get
}
/** A description of the phases that will run */
def phaseDescriptions: String = {
new Run // force some initialization
val messages =
for (phase <- phaseDescriptors)
yield phase.phaseName //todo: + " - " + phase.description
messages.mkString("\n")
}
// ----------- Runs ---------------------------------------
private var curRun: Run = null
private var curRunId = 0
/** The currently active run
*/
def currentRun: Run = curRun
/** The id of the currently active run
*/
override def currentRunId = curRunId
/** A Run is a single execution of the compiler on a sets of units
*/
class Run {
private val firstPhase = {
// ----------- Initialization code -------------------------
curRunId += 1
assert(curRunId > 0)
curRun = this
//Console.println("starting run: " + id)
// Can not take the phaseDescriptors.head even though its the syntaxAnalyser, this will implicitly
// call definitions.init which uses phase and needs it to be != NoPhase
val phase1 = syntaxAnalyzer.newPhase(NoPhase)
phase = phase1
definitions.init // needs phase to be defined != NoPhase,
// that's why it is placed here.
// The first phase in the compiler phase chain
var p: Phase = phase1
// Reset the cache in terminal, the chain could have been build before where nobody used it
// This happens in the interpreter
terminal.reset
// Each subcomponent is asked to deliver a newPhase that is chained together. If -Ystop:phasename is
// given at command-line, this will stop with that phasename
for (pd <- phaseDescriptors.tail.takeWhile(pd => !(stopPhase(pd.phaseName))))
if (!(settings.skip contains pd.phaseName)) p = pd.newPhase(p)
// Ensure there is a terminal phase at the end, Normally there will then be two terminal phases at the end
// if -Ystop:phasename was given, this makes sure that there is a terminal phase at the end
p = terminal.newPhase(p)
phase1
}
// --------------- Miscellania -------------------------------
/** The currently compiled unit; set from GlobalPhase */
var currentUnit: CompilationUnit = _
/** Flags indicating whether deprecation warnings occurred */
var deprecationWarnings: Boolean = false
var uncheckedWarnings: Boolean = false
def cancel { reporter.cancelled = true }
// ------------------ Progress tracking -------------------------
def progress(current: Int, total: Int) {}
private var phasec: Int = 0
private var unitc: Int = 0
/** take note that phase is completed
* (for progress reporting)
*/
def advancePhase {
unitc = 0
phasec += 1
refreshProgress
}
/** take note that a phase on a unit is completed
* (for progress reporting)
*/
def advanceUnit {
unitc += 1
refreshProgress
}
private def refreshProgress =
if (fileset.size > 0)
progress((phasec * fileset.size) + unitc,
(phaseDescriptors.length-1) * fileset.size) // terminal phase not part of the progress display
// ----- finding phases --------------------------------------------
def phaseNamed(name: String): Phase = {
var p: Phase = firstPhase
while (p.next != p && p.name != name) p = p.next
if (p.name != name) NoPhase else p
}
val namerPhase = phaseNamed("namer")
val typerPhase = phaseNamed("typer")
val picklerPhase = phaseNamed("pickler")
val refchecksPhase = phaseNamed("refchecks")
val explicitOuterPhase = phaseNamed("explicitouter")
val erasurePhase = phaseNamed("erasure")
val flattenPhase = phaseNamed("flatten")
val mixinPhase = phaseNamed("mixin")
val icodePhase = phaseNamed("icode")
/** A test whether compilation should stop at phase with given name */
protected def stopPhase(name : String) = settings.stop.contains(name)
// ----------- Units and top-level classes and objects --------
private var unitbuf = new ListBuffer[CompilationUnit]
private var fileset = new HashSet[AbstractFile]
/** add unit to be compiled in this run */
private def addUnit(unit: CompilationUnit) {
unitbuf += unit
fileset += unit.source.file
}
/* An iterator returning all the units being compiled in this run */
def units: Iterator[CompilationUnit] = unitbuf.iterator
/** A map from compiled top-level symbols to their source files */
val symSource = new HashMap[Symbol, AbstractFile]
/** A map from compiled top-level symbols to their picklers */
val symData = new HashMap[Symbol, PickleBuffer]
/** does this run compile given class, module, or case factory? */
def compiles(sym: Symbol): Boolean =
if (sym == NoSymbol) false
else if (symSource.isDefinedAt(sym)) true
else if (!sym.owner.isPackageClass) compiles(sym.toplevelClass)
else if (sym.isModuleClass) compiles(sym.sourceModule)
else false
// --------------- Compilation methods ----------------------------
/** Compile list of source files */
def compileSources(_sources: List[SourceFile]) {
val sources = dependencyAnalysis.filter(_sources.removeDuplicates) // bug #1268, scalac confused by duplicated filenames
if (reporter.hasErrors)
return // there is a problem already, e.g. a
// plugin was passed a bad option
val startTime = currentTime
reporter.reset
for (source <- sources) addUnit(new CompilationUnit(source))
globalPhase = firstPhase
while (globalPhase != terminal.newPhase(NoPhase) && !reporter.hasErrors) {
val startTime = currentTime
phase = globalPhase
globalPhase.run
if (settings.print contains globalPhase.name)
if (settings.writeICode.value && globalPhase.id >= icodePhase.id) writeICode()
else if (settings.Xshowtrees.value) nodePrinters.printAll()
else printAllUnits()
if (settings.printLate.value && globalPhase.name == "cleanup")
printAllUnits()
if (settings.browse contains globalPhase.name) treeBrowser.browse(units)
informTime(globalPhase.description, startTime)
globalPhase = globalPhase.next
if (settings.check contains globalPhase.prev.name) {
if (globalPhase.prev.checkable) {
phase = globalPhase
if (globalPhase.id >= icodePhase.id) icodeChecker.checkICodes
else checker.checkTrees
}
else if (!settings.check.doAllPhases) {
warning("It is not possible to check the result of the "+globalPhase.name+" phase")
}
}
if (settings.statistics.value) statistics.print(phase)
advancePhase
}
if (settings.Xshowcls.value != "")
showDef(newTermName(settings.Xshowcls.value), false)
if (settings.Xshowobj.value != "")
showDef(newTermName(settings.Xshowobj.value), true)
if (reporter.hasErrors) {
for ((sym, file) <- symSource.iterator) {
sym.reset(new loaders.SourcefileLoader(file))
if (sym.isTerm) sym.moduleClass.reset(loaders.moduleClassLoader)
}
} else {
//assert(symData.isEmpty || !settings.stop.value.isEmpty || !settings.skip.value.isEmpty, symData)
if (deprecationWarnings) {
warning("there were deprecation warnings; re-run with " + settings.deprecation.name + " for details")
}
if (uncheckedWarnings) {
warning("there were unchecked warnings; re-run with " + settings.unchecked.name + " for details")
}
}
for ((sym, file) <- symSource.iterator) resetPackageClass(sym.owner)
informTime("total", startTime)
if (!dependencyAnalysis.off)
dependencyAnalysis.saveDependencies()
}
// When all is said and done, if the dependencies file is 0 length
// delete it so people do not curse it with the vehemence with which
// they curse .DS_Store and the like.
def cleanupDependenciesFile() =
for (f <- dependencyAnalysis.dependenciesFile ; size <- f.sizeOption ; if size == 0)
f.delete
/** Compile list of abstract files */
def compileFiles(files: List[AbstractFile]) {
try {
compileSources(files map getSourceFile)
} catch {
case ex: IOException => error(ex.getMessage())
}
finally cleanupDependenciesFile
}
/** Compile list of files given by their names */
def compile(filenames: List[String]) {
try {
val scriptMain = settings.script.value
// Are we compiling a script?
if (scriptMain != "") {
if(filenames.length != 1)
error("can only compile one script at a time")
val scriptFile =
ScriptRunner.wrappedScript(scriptMain, filenames.head, getSourceFile)
compileSources(List(scriptFile))
// No we are compiling regular source files
} else {
compileSources(filenames map getSourceFile)
}
} catch {
case ex: IOException => error(ex.getMessage())
}
finally cleanupDependenciesFile
}
/** Compile abstract file until `globalPhase`, but at least
* to phase "namer".
*/
def compileLate(file: AbstractFile) {
if (fileset eq null) {
val msg = "No class file for " + file +
" was found\n(This file cannot be loaded as a source file)"
inform(msg)
throw new FatalError(msg)
}
else if (!(fileset contains file)) {
compileLate(new CompilationUnit(getSourceFile(file)))
}
}
/** Compile abstract file until `globalPhase`, but at least
* to phase "namer".
*/
def compileLate(unit: CompilationUnit) {
addUnit(unit)
var localPhase = firstPhase.asInstanceOf[GlobalPhase]
while (localPhase != null && (localPhase.id < globalPhase.id || localPhase.id <= namerPhase.id) && !reporter.hasErrors) {
val oldSource = reporter.getSource
reporter.setSource(unit.source)
atPhase(localPhase)(localPhase.applyPhase(unit))
val newLocalPhase = localPhase.next.asInstanceOf[GlobalPhase]
localPhase = if (localPhase == newLocalPhase) null else newLocalPhase
reporter.setSource(oldSource)
}
refreshProgress
}
/** Reset package class to state at typer (not sure what this
* is needed for?)
*/
private def resetPackageClass(pclazz: Symbol) {
atPhase(firstPhase) {
pclazz.setInfo(atPhase(typerPhase)(pclazz.info))
}
if (!pclazz.isRoot) resetPackageClass(pclazz.owner)
}
} // class Run
def printAllUnits() {
print("[[syntax trees at end of " + phase + "]]")
atPhase(phase.next) {
for (unit <- currentRun.units) treePrinter.print(unit)
}
}
def showDef(name: Name, module: Boolean) {
def getSym(name: Name, module: Boolean): Symbol = {
var i = name.length - 1
while (i != 0 && name(i) != '#' && name(i) != '.') i -= 1
if (i == 0)
definitions.getModule(name)
else {
val root = getSym(name.subName(0, i), name(i) == '.')
var selector = name.subName(i+1, name.length)
if (module) selector = selector.toTypeName
root.info.member(selector)
}
}
val sym = getSym(name, module)
inform("" + sym.name + ":" +(if (module) sym.tpe.typeSymbol.info else sym.info))
}
/** Returns the file with the given suffix for the given class. */
def getFile(clazz: Symbol, suffix: String): File = {
val outdirname = settings.outputDirs.outputDirFor(clazz.sourceFile)
var outdir = new File(if (outdirname.path == "") "." else outdirname.path)
val filename = clazz.fullNameString('.')
var start = 0
var end = filename.indexOf('.', start)
while (end >= start) {
outdir = new File(outdir, filename.substring(start, end))
if (!outdir.exists()) outdir.mkdir()
start = end + 1
end = filename.indexOf('.', start)
}
new File(outdir, filename.substring(start) + suffix)
}
private def writeICode() {
val printer = new icodes.TextPrinter(null, icodes.linearizer)
icodes.classes.values.foreach((cls) => {
val suffix = if (cls.symbol hasFlag Flags.MODULE) "$.icode" else ".icode"
var file = getFile(cls.symbol, suffix)
// if (file.exists())
// file = new File(file.getParentFile(), file.getName() + "1")
try {
val stream = new FileOutputStream(file)
printer.setWriter(new PrintWriter(stream, true))
printer.printClass(cls)
informProgress("wrote " + file)
} catch {
case ex: IOException =>
if (settings.debug.value) ex.printStackTrace()
error("could not write file " + file)
}
})
}
def forJVM : Boolean = settings.target.value startsWith "jvm"
def forMSIL: Boolean = settings.target.value == "msil"
def onlyPresentation = false
private val unpickleIDEHook0 : (( => Type) => Type) = f => f
def unpickleIDEHook : (( => Type) => Type) = unpickleIDEHook0
def doPickleHash = false
}
|